A cannon ball is fired so that it hits the wall at the top of a 10m tower.If the energy needed to destroy the wall is 49000 F and the mass of the cannon ball is 10 k, the minimum initial velocity of the cannon ball required to break the tower wall is

the initial KE goes into raising the cannonon ball to the height of 10 m, and then giving it energy to break the wall. Yes, at the top it has KE to break the wall of 49000J.

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